Type-writer-carriage construction.



N0. 762,223. PATENTED JUNE 7, 1904. J. ALEXANDER.

TYPE WRITER CARRIAGE CONSTRUCTION. 'Am moulon FILED saw. 9, 1903.

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UNITED STATES Patented June 7, 1904.

PATENT OFFICE.

JESSE ALEXANDER,.OF BROOKLYN, NEW YORK. ASSIGNOR OF ONE-HALF TO WALTER E. SCOTT, OF BROOKLYN, NEXV YORK.

TYPE-WRlTER-CARRIAGE CONSTRUCTION.

SPECIFICATION forming part of LettersPatent No. 762,223, dated June 7, 1904:.

Application file; $eptember 9,1903. Serial No. 172,485. (No model.)

To ctl whom, it may concern.-

Be it known thatI, JEssE ALEXANDER, a citizen of the United States, residing at Brooklyn, in the county of 'Kings, State of New York, have invented certain new and useful Improvements in Type-W'riter-Carriage Construction, of which the following is a full, clear, and exact description.

My invention relates to improvements in type-writers, and particularly to the carriage construction thereof.

The object of my invention is to improve the construction of the carriage mechanism of type-writers, so thatflthe platen and other parts associated therewith may be removed readily from the main body of the machine, so as to conveniently interchange the parts for the purpose of placing a larger or a smaller platen on the machine.

The invention consists particularly in the means by which the platen and platen-carriage frame are secured to the main body of the machine or removed therefrom at will," adjusting means being provided, so that a wider.

or narrower platen may be secured.

In the drawings, Figure 1 is a plan view of those parts of a type-writer construction which embody the improvements of my invention. Fig. 2 is a front elevation of the same parts of a type-writer. Fig. 3 is an end elevation of the same. Fig. 4 is a perspective view of a detail, showing the means of connecting the carriage-frames to the main body of the machine.

1 indicates a fragment of the frame of the machine, which may be of suitable construction. I

2 is a back plate or supporting member which extends across from side to side of the machine at the back.

3 is a bar somewhat to the front of the back plate 2, which connects the two side frames 1 1.

4 4 are carriage-supporting plates, whichrest upon the back plate 2 and have at the ends the brackets 5 5. 6 is a rear guide-rail carried by these brackets 5 5 and secured thereto in a suitable manner by means of ad j ustingscrews 7 7.

8 is the main back bar of the carriage,which connects the two carriage-frame plates 9 9. 5 At the front these carriage-plates are connected by a front guide-rail 10. The back bar 8 is secured to a piece 11, having collars 12 12, which surround and are guided upon the rear guide-rail 6. The front guide-rail 10 runs upon a pulley 13 as the carriage is moved back and forth. This pulley is mounted on the front connecting-bar 3.

14: 14: are platen-carrying plates or frames, which are pivoted to the carriage-frames 9 9 by means of the adjusting screws 15 15. These screws are omitted in Fig. 2.

16 is the platen-shaft.

17 is an auxiliary front guide-rail, which is adapted to be raised by either one of the shift- 5 ing rollers 18 18. The method of shifting these, however, is not'concerned in this application, and therefore need not be further described.

19 is an escapement-dog pivotally carried 7 by the block 20, which in turn is supported on the back plate 2 of the machine-frame.

21 is a toothed rack, which coacts with the dog 19 for the purpose of limiting the feed of the machine. These parts are, however, not concerned in this application, excepting so far as the location of the escapement-dog and block 20 effect the necessary construction of the carriage. It will therefore be seen that the platen and platen-carrying frames are pivoted to the carriage-frames and that both frames are supported on guides, so as to have longitudinal movement of the frame of the machine.

It is desirable in many instances that it be 5 possible to remove the ordinary platen and employ a larger or a smaller one or one adapted to special work, as may be desired. For this purpose I have made this carriage construction in such a manner that the entire 9 platen and carriage-frame may be readily removed from the frame of the machine or replaced when necessary, the supporting parts being constructed so as to admit of the attachment of longer or shorter frames. struction by means of which this is effected will be more clearly seen on an inspection of Fig. 4:.

The con- 29. is a toothed or notched plate, which is secured to the back-supporting plate 2 of the machine, and 23 is a similarly notched or toothed plate carried by the adjustable plate 4 of the carriage structure.

24: is a clamp which is pivoted at 25 and has a handle 26, by means of which the clamp may be thrown down, so as to hold the adjustable plate A and the supporting-plate 2 tightly in engagement.

27 27 are lugs or supporting-posts, which project upward on either side of the plate 4: and serve to support the clamp 24 as well as to guide the plate 4: and assist in holding it from twisting. This latter effect is also assisted by constructing the toothed or notched plate of a greater depth than the adjustable plate 4:, so that it extends downward in front of the top edge of the supporting-plate 2.

When the clamp 24: is released and the securing-screws 7 7 are removed, the two adjustable supporting-plates A A may be drawn outward or brought together to accommodate any length of guide-rod 6 that may be desired. In order that the adjustment between the clamp 24: and the plate 4 may be effected without injury to the parts and to provide for the clamp acting securely, it is preferred that this be formed of spring metal, so as to yield slightly when the parts are being clamped together. Obviously the only limit of adjustment of the partswould be determined by the length of the plate A, suitable for a machine of a general character. These clamps 24 24 are preferably situated so that the handles 26 26 can be easily accessible when the carriage is moved to one side, as will be seen on inspection of the left-hand end of Fig. 1, where the carriage has been moved to the right, so as to leave the handle 26 exposed.

It is of course understood that the platen and paper-feeding mechanism are not shown in the drawings, for the reason that they are not concerned in the invention and would only obscure the construction which it is necessary to show.

What I claim is 1. A typewriter-carriage construction including, a main supporting member, a pair of adjustable plates mounted thereon, a guiderail carried by said plates, a pair of lugs or supporting-posts projecting up at either side of said plates and a clamp pivoted in said lugs for securing said plates and supporting members together.

2. A type-writer-carriage construction including, a main supporting member, a pair of adjustable carriage supporting plates, said plates and members having notched portions for engagement with one another, a guiderail carried by said plates, and a clamp for holding the two plates and members together.

3. A type-writer-carriage construction including, a main supportingplate, a pair of ad justable carriage-supporting plates, a guide- 5 rail supported by said adjustable plates, a longitudinally-movable carriage construction mounted on said rail, said plates having correspondinglynotched portions for engagement with one another, and clamps for holding them together.

4- A type-writer-carriage construction in cluding, a main supporting-plate, a pair of adj ustable plates mounted thereon, a rear guiderail carried by said adjustable plates, carriageframes, a front and a rear connecting-bar for said carriage frames said rear bar being guided upon the rear guide-rail, a front connecting guide-rail for said frames, a guidewheel supporting said front guide-rail and adjustable spring-pressed clamps for holding said adjustable plates against the supportingplate.

5. A type-writer-earriage construction including amain supporting-plate, two carriagesupporting plates resting on said main supporting-plate, said main and carriage plates having notched portions engaging with one another and a spring-clamp for holding the two plates together.

6. A type-writer-carriage construction including, a pair of adjustable carriage-plates, a supporting-plate therefor, a notched member carried by the supporting-plate and correspondingly-notched members carried by the adj List-able plates one of said notched members projecting beyond the edge of the body of the support for the corresponding notched member, and means for holding the adjustable plates in position on the supportingplate whereby the plates may be held together in their adjustable position.

7 A type-writer-carriage construction including, a supporting member, adjustable carriage-supporting plates mounted thereon, a pair of lugs projecting upward from the supporting member and embracing the adjustable plates, and means carried by said posts for adjustably and removably holding the plates in position.

8. A typewriter-carriage construction including, a main supporting-plate, a pair of adjustable carriage-supporting plates mounted thereon, brackets carried by said latter plates, a guide-rail movably carried by said brackets, a carriage construction longitudinally movable on said rail, two clamps carried by the main supporting-plate and mounted on horizontal axes one clamp for each of said adjustable plates, and operating knobs for said clamps projecting upward accessible from above.

9. A type-writer-carriage construction including, a main supporting-plate, a pair of adjustable carriage-supporting plates mounted thereon, lugs projecting upward from the main plate on each side of the adjustable plates, notched members carried by the main and adyond the edge of the adjacent plate, and movable clamping means for holding the plates together in their adjusted positions.

12. A type-writer-carriage construction including, a main supporting-plate, a pair of adjustable carriage-supporting plates, a plate carried by one of said plates projecting beyond the edge of the adjacent plate, and pivoted clamping means for holding the plates together in their adjusted positions.

JESSE ALEXANDER. Witnesses:

RoBT. S. ALLYN, L. VREELAND. 

